When two galaxies collide, not everything gets smashed to bits. Instead, the vast distances between stars mean that direct collisions between individual stars are rare. The gravitational interactions can cause dramatic shifts in orbits, triggering star formation as gas clouds compress, but the galaxies generally merge over time, forming a new, larger galaxy. As for black holes, it is widely believed that each contains a singularity, a point where matter is infinitely dense and the laws of physics as we know them break down. However, the true nature of singularities remains speculative, as they are hidden behind event horizons, and current physics cannot fully describe their properties.